Yes that is what was going for, but you have to keep in mind, i am rather guessing, its hard both to describe or try to understand issues on forum, sometimes descriptions depend just on how one understands label words e.g. attributes like "vibration" which sort of have different meaning to everybody. The steppers work at high frequency, so basically their input varies widely and regardless how much the inductance tends to level things it can not do it perfectly so the coil fields also vibrate, except that the mechanical part has some inertia and rotor just cant keep up with that kind of movement, but otherwise they are just sort of giant vibrators :) So i'd say the main cuplrit is the mode of functioning itself. Arguably my impression is that most audible noise comes from decay part, which can be tweaked, except this particular driver and chip are made for the cheap market and do not offer much flexibility for that adjustment. On the other hand shorting out the Rosc to gnd its one functioning mode, its in the datasheet, i think it makes sense in the case it can theoretically help, so i think you should get some improvement with that, at least its worth trying coz there isnt much else to do.
↧